Update public domain license, add SPDX identifiers

Switch the license of the essentially public domain source files from
a license statement I borrowed from the IETF to a more standard FSF
all-permissive license.

Add SPDX-License-Identifier headers to all substantial source files,
and add a test to check for them.

Author: rra

.gitignore

@@ -1,3 +1,14 @@
+# Ignore list for Git.  -*- conf -*-
+#
+# Copyright 2008-2014, 2016, 2018 Russ Allbery <[email protected]>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice and
+# this notice are preserved.  This file is offered as-is, without any
+# warranty.
+#
+# SPDX-License-Identifier: FSFAP
+
 /Makefile
 /Makefile.in
 /aclocal.m4

Makefile.am

@@ -1,11 +1,11 @@
 # Automake makefile for rra-c-util.
 #
 # Written by Russ Allbery <[email protected]
-# Copyright 2015, 2016, 2017 Russ Allbery <[email protected]>
-# Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014
+# Copyright 2015-2018 Russ Allbery <[email protected]>
+# Copyright 2008-2014
 #     The Board of Trustees of the Leland Stanford Junior University
 #
-# See LICENSE for licensing terms.
+# SPDX-License-Identifier: MIT
 
 ACLOCAL_AMFLAGS = -I m4
 EXTRA_DIST = .gitignore .travis.yml LICENSE README.md bootstrap		    \
@@ -20,8 +20,8 @@ EXTRA_DIST = .gitignore .travis.yml LICENSE README.md bootstrap		    \
 	tests/data/generate-krb5-conf tests/data/krb5-pam.conf		    \
 	tests/data/perl.conf tests/data/perlcriticrc tests/data/perltidyrc  \
 	tests/data/valgrind.supp tests/docs/pod-spelling-t tests/docs/pod-t \
-	tests/docs/urls-t tests/fakepam/README tests/kafs/basic-t	    \
-	tests/perl/critic-t tests/perl/minimum-version-t		    \
+	tests/docs/spdx-license-t tests/docs/urls-t tests/fakepam/README    \
+	tests/kafs/basic-t tests/perl/critic-t tests/perl/minimum-version-t \
 	tests/perl/module-version-t tests/perl/strict-t			    \
 	tests/tap/kerberos.sh tests/tap/libtap.sh			    \
 	tests/tap/perl/Test/RRA.pm tests/tap/perl/Test/RRA/Automake.pm	    \

NEWS

@@ -13,6 +13,13 @@ rra-c-util 7.1 (unreleased)
     Add maintainer check-cppcheck target to run cppcheck across the source
     base with a standard configuration.  Fix all issues found by cppcheck.
 
+    Switch the license of the essentially public domain source files from
+    a license statement I borrowed from the IETF to a more standard FSF
+    all-permissive license.
+
+    Add SPDX-License-Identifier headers to all substantial source files,
+    and add a test to check for them.
+
     Skip more Autoconf and Automake files in the all_files function of
     Test::RRA::Automake.
 

bootstrap

@@ -1,16 +1,20 @@
 #!/bin/sh
 #
 # Run this shell script to bootstrap as necessary after a fresh checkout.
+#
+# Copyright 2008, 2012-2013, 2016, 2018 Russ Allbery <[email protected]>
+#
+# SPDX-License-Identifier: MIT
 
 set -e
 
 # Regenerate all the autotools files.
 autoreconf -i --force
 
 # Generate manual pages.
-version=`grep '^rra-c-util' NEWS | head -1 | cut -d' ' -f2`
-for doc in xmalloc ; do
-    pod2man --release="$version" --center="rra-c-util" --section=3 \
-        --name=`echo "$doc" | tr a-z A-Z` docs/api/"$doc".pod \
+version=$(grep '^rra-c-util' NEWS | head -1 | cut -d' ' -f2)
+for doc in xmalloc; do
+    pod2man --release="$version" --center="rra-c-util" --section=3      \
+        --name=$(echo "$doc" | tr a-z A-Z) docs/api/"$doc".pod          \
         > docs/api/"$doc".3
 done

configure.ac

@@ -1,15 +1,15 @@
 dnl Autoconf configuration for rra-c-util.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2000, 2003, 2013, 2014, 2015, 2016, 2017
-dnl     Russ Allbery <[email protected]>
-dnl Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
-dnl     2012, 2013, 2014
+dnl Copyright 2000, 2003, 2013-2018 Russ Allbery <[email protected]>
+dnl Copyright 2002-2014
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl I use this introductory boilerplate for all configure.ac files, changing
 dnl the AC_INIT arguments as appropriate.

docs/api/xmalloc.pod

@@ -1,5 +1,6 @@
 =for stopwords
 xmalloc xcalloc xrealloc nmemb extern const resized rra-c-util Allbery
+SPDX-License-Identifier FSFAP
 
 =head1 NAME
 
@@ -102,4 +103,6 @@ permitted in any medium without royalty provided the copyright notice and
 this notice are preserved.  This file is offered as-is, without any
 warranty.
 
+SPDX-License-Identifier: FSFAP
+
 =cut

kafs/kafs.c

@@ -38,6 +38,8 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
  */
 
 #include <config.h>

kafs/sys-darwin10.c

@@ -13,7 +13,7 @@
  * which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
  *
  * Written by Russ Allbery <[email protected]>
- * Copyright 2006, 2007, 2009, 2010, 2011
+ * Copyright 2006-2007, 2009-2011
  *     The Board of Trustees of the Leland Stanford Junior University
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -33,6 +33,8 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
  */
 
 /*

kafs/sys-darwin8.c

@@ -15,7 +15,7 @@
  * which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
  *
  * Written by Russ Allbery <[email protected]>
- * Copyright 2006, 2007, 2009, 2010
+ * Copyright 2006-2007, 2009-2010
  *     The Board of Trustees of the Leland Stanford Junior University
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -35,6 +35,8 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
  */
 
 /*

kafs/sys-linux.c

@@ -14,7 +14,7 @@
  * which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
  *
  * Written by Russ Allbery <[email protected]>
- * Copyright 2006, 2007, 2009
+ * Copyright 2006-2007, 2009
  *     The Board of Trustees of the Leland Stanford Junior University
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -34,6 +34,8 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
  */
 
 /* 

kafs/sys-solaris.c

@@ -35,6 +35,8 @@
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
  */
 
 /*

kafs/sys-syscall.c

@@ -14,14 +14,15 @@
  * which can be found at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
  *
  * Written by Russ Allbery <[email protected]>
+ * Copyright 2009, 2011, 2013
+ *     The Board of Trustees of the Leland Stanford Junior University
  *
- * The authors hereby relinquish any claim to any copyright that they may have
- * in this work, whether granted under contract or by operation of law or
- * international treaty, and hereby commit to the public, at large, that they
- * shall not, at any time in the future, seek to enforce any copyright in this
- * work against any person or entity, or prevent any person or entity from
- * copying, publishing, distributing or creating derivative works of this
- * work.
+ * Copying and distribution of this file, with or without modification, are
+ * permitted in any medium without royalty provided the copyright notice and
+ * this notice are preserved.  This file is offered as-is, without any
+ * warranty.
+ *
+ * SPDX-License-Identifier: FSFAP
  */
 
 #include <afs/param.h>

m4/apache.m4

@@ -22,6 +22,8 @@ dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Headers to include when probing for Apache properties.
 AC_DEFUN([RRA_INCLUDES_APACHE], [[

m4/apr.m4

@@ -16,12 +16,14 @@ dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2010, 2011
+dnl Copyright 2010-2011
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
 dnl versions that include the Apache flags.  Used as a wrapper, with

m4/aprutil.m4

@@ -17,12 +17,14 @@ dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2010, 2011
+dnl Copyright 2010-2011
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
 dnl versions that include the Apache flags.  Used as a wrapper, with

m4/bdb.m4

@@ -35,6 +35,8 @@ dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
 dnl versions that include the Berkeley DB flags.  Used as a wrapper, with

m4/clang.m4

@@ -10,6 +10,8 @@ dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Source used by RRA_PROG_CC_CLANG.
 AC_DEFUN([_RRA_PROG_CC_CLANG_SOURCE], [[

m4/curl.m4

@@ -24,6 +24,8 @@ dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
 dnl versions that include the cURL flags.  Used as a wrapper, with

m4/gssapi.m4

@@ -22,12 +22,14 @@ dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2005, 2006, 2007, 2008, 2009, 2011, 2012
+dnl Copyright 2005-2009, 2011-2012
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Headers to include when probing for Kerberos library properties.
 AC_DEFUN([RRA_INCLUDES_GSSAPI], [[

m4/inet-ntoa.m4

@@ -9,13 +9,15 @@ dnl
 dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
-dnl Copyright 1999, 2000, 2001, 2003 Russ Allbery <[email protected]>
-dnl Copyright 2008, 2009
+dnl Copyright 1999-2001, 2003 Russ Allbery <[email protected]>
+dnl Copyright 2008-2009
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Source used by RRA_FUNC_INET_NTOA.
 AC_DEFUN([_RRA_FUNC_INET_NTOA_SOURCE], [[

m4/kadm5clnt.m4

@@ -21,12 +21,14 @@ dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2005, 2006, 2007, 2008, 2009, 2011, 2013
+dnl Copyright 2005-2009, 2011, 2013
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
 dnl versions that include the kadmin client flags.  Used as a wrapper, with

m4/kafs.m4

@@ -35,12 +35,14 @@ dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2008, 2009, 2010
+dnl Copyright 2008-2010
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
 dnl versions that include the libkafs flags.  Used as a wrapper, with

m4/krb5-config.m4

@@ -11,12 +11,14 @@ dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2011, 2012
+dnl Copyright 2011-2012
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Check for krb5-config in the user's path and set PATH_KRB5_CONFIG.  This
 dnl is moved into a separate macro so that it can be loaded via AC_REQUIRE,

m4/krb5-pkinit.m4

@@ -8,11 +8,16 @@ dnl
 dnl and defines HAVE_KRB5_GET_INIT_CREDS_OPT_SET_PKINIT_9_ARGS if it takes
 dnl only nine arguments.
 dnl
+dnl Written by Russ Allbery <[email protected]>
+dnl Copyright 2007, 2018 Russ Allbery <[email protected]>
 dnl Copyright 2011
 dnl     The Board of Trustees of the Leland Stanford Junior University
-dnl Copyright 2007 Russ Allbery <[email protected]>
 dnl
-dnl See LICENSE for licensing terms.
+dnl This file is free software; the authors give unlimited permission to copy
+dnl and/or distribute it, with or without modifications, as long as this
+dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Check whether krb5_get_init_creds_opt_set_pkinit takes eleven arguments
 dnl (0.8 release candidates and later) or only nine (0.7).  Defines

m4/krb5.m4

@@ -50,12 +50,14 @@ dnl The canonical version of this file is maintained in the rra-c-util
 dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
 dnl
 dnl Written by Russ Allbery <[email protected]>
-dnl Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013, 2014
+dnl Copyright 2005-2011, 2013-2014
 dnl     The Board of Trustees of the Leland Stanford Junior University
 dnl
 dnl This file is free software; the authors give unlimited permission to copy
 dnl and/or distribute it, with or without modifications, as long as this
 dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
 
 dnl Ignore Automake conditionals if not using Automake.
 m4_define_default([AM_CONDITIONAL], [:])